128199868 has 12 divisors (see below), whose sum is σ = 224476000. Its totient is φ = 64063872.

The previous prime is 128199833. The next prime is 128199871. The reversal of 128199868 is 868991821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 16012.

Almost surely, 2^128199868 is an apocalyptic number.

It is an amenable number.

128199868 is a deficient number, since it is larger than the sum of its proper divisors (96276132).

128199868 is a wasteful number, since it uses less digits than its factorization.

128199868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18036 (or 18034 counting only the distinct ones).

The product of its digits is 497664, while the sum is 52.

The square root of 128199868 is about 11322.5380546943. The cubic root of 128199868 is about 504.2305938594.

The spelling of 128199868 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, eight hundred sixty-eight".